Oracle instance properties script (ORACLE_HOME, STATE, VERSION ...)

This script will give some important properties of your instance

SELECT status,
       startup_time,
       instance_name,
       version,
       host_name,
       (SELECT SUBSTR (file_spec, 1, INSTR (file_spec, 'lib') - 2)
          FROM dba_libraries
         WHERE library_name = 'DBMS_SUMADV_LIB')
          ORACLE_HOME
  FROM v$instance;